Ice-machine



I. B. JOHNSTON.

' ICE MACHINE.

APPLICATION FILED MAYB.191B.

PatentedAug. 9, 1921,

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Y ICE-MACHINE application med my s, 191s. seriarN. 233,231.

To all 'whom it may concern.'

Be it known that 1, James B. JOHNSTON, a. citizen ofthe United States,residing in the city and county ofyPhiladelphia, State of Pennsylvania,have invented a new and useful Ice-Machine, of which the following is aspecification. l s

My present invention consists of a novel \ice machine rin which vacuum,absorbent, and freezing chambers are; employed and wherein provision ismade to produce a vacuum in said vacuum chamber, the freezing chamberbeinglsurrounded byiinsulating material.

It further consists of a novel construction and arrangement of a casingand its v cover, a novel construction and arrangement .of containers,and of a liquid tank, novel means for securing such parts in assembledposition, and novel means for effecting a seal.

` Other novel features of construction and advantage will hereinaftermore clearly appear in the detailed description of my 1nvention. l

For thepurpose of illustrating my lnven-` tion, ,I have shown in the-accompanying vdrawing one form thereof which is at present preferred byme, since the same w1ll be `foundin practice to givesatisfactory andreliable results, although it is to be understood that the variousinstrumentalities o f which my invention consists can be variouslyarranged and organized and that my invention is not limited to theprecise arrangement and organization of these instrumentalities asherein shown and described.

Figure 1 represents in side elevation an ice machine embodying myinvention.

Fig. 2 represents a section on line 2-2 of Fig. 1.

Fig. 3 represents a section on line 3 3 of Fig. 2.

Fig. 4 represents, on an enlarged scale, a vertical section of a portionof the ice machine, the section being4 taken on substantially line 2--2of Fig. 1.

Fig. 5 represents, in vertical section, a valve connection employed.

Similar numerals of reference indicate corresponding parts. Y.

Referring to the drawings,

1 designates the outer container of an ice machine, embodying myinvention. lThis outer container is supported on a ring shaped base 2secured to it 1n any desired S'peciication of Letters Patent.

Patented Aug.. 9, 11921..

manner. 3 designates an intermediate container which is spaced from theouter container and contributes to form with it a vacuum chamber 4. Boththe outer container 1 and theI intermediate container 3 are preferablyrounded at their bottoms and are connecte `with each other only at theirupper ends and in such a manner as to seal the upper end of the vacuum'chamber 4'. The construction employed to form such seal will best beunderstood by reference to Fig. 4. 5 designates a ring having below itsupper end a laterally and inwardly extendlng flange 6 which forms a seatfor a gasket 7 and is deflected downwardly and secured in any desired'manner to the intermediate container 3. 8 designates a ring or collarwhich is externally threaded, and at its lower portion it is deflecteddownwardly and laterally to form a seat `for a gasket 9, and it is thendeflected downwardly and secured in any desired manner to the inner faceof the outer container 1. f

10 designates a layer of insulation which is disposed between the ring 5and the collar 8. an'd such parts may be connected together, if desired,in any conventional manner.

11 designates an inner container spaced from the intermediate containerand of the same contour and contributing with it to form a chamber 12which isfilled with insulating materials 13 in a molded form and of adesired thickness.

Thelupper ends of the containers 3 and 11 are connected`by a ring shapedplate 14. 15 designates a water tank which @is preferably provided withdouble walls and as illustrated it is of rectangular contour so as toform with the inner container 11 a freezing chamber 16. 17 designates apipe which extendsthrough. the side walls of the containers 1, 3 and 11and is deflected upwardly to present its open end at the upper end ofthe freezing chamber 16. This pipe also has a branch 18 leading to adouble acting vacuum pump 19 provided with an operatv Aing arm 20. Thepipe 17A is provided with a valve seat 21 having a port 22 communicatingwith its open end and the branch pipe 18 and the valve seat 21 also hasa port 23 communicating with the open end ofthe pipe 17 and withthelvacuum chamber 4. 24-designates a valve controlling the ports 22 and23 and having its stem passing through a stuffing box and provided witha handle 25. rllhe cover consists of an outer shell 26, an intermediateshell 27, and an` inner shell 28, all of which are preferably of curvedcontour.

formed by the shells 26 and 27. 30 d esignates an absorbent chamberformedby the shells 27 and 28 and such absorbent chamber is lilled withhygroscopic material 31. The inner shell 28 is perforated 'or apertured,as

at 32, and the chamber 30 is closed by anannular plate 33,. r1`he vacuumchamber 29 is sealed in substantially a similar manner to that alreadydescribed` with reference to the vacuum chamber 4. ,As seen in Fig. 4the shell 27 has secured to it in any desired manner an internallythreaded collar 34 having an inwardly extending flange 35 which isprovided with an annular bead 36 which seats in the gasket 7 when thecover is secured in position. 37 designatesa ring shaped plateconnected'with the outer shell 26 and provided with an outwardlyextending flange 38 which has an annular bead 39v which seats in thegasket 9. A v

40 designates a layer of insulation'secured between the members 34 and37 in any desired manner. 41 designates an annulus secured to the shell26 and adapted to extend over the joint formed between the body portionof the machine and its cover.

rlhe cover is provided with a grasping lhandle 42. .When the cover isclosed the outer insulating chambers substantially surround theabsorbent chamber and serve as insulation to protect the inner chamberfrom induction. If water is present and the vacuum is produced byactuating the handle 20 the temperature will lower as the evaporationtakes place. Y.

It will be understood that when the vacuum pump is working the valve 24is open and when the desired vacuum has been obtained the valve isclosed, the result of which is evident to those skilled in this art.

It will `now be apparent that I have devised a novel and usefulconstruction of i'ce machine which embodies the features of advantageenumerated as desirable inthe statel in the free'zin ing chamber andlower chamber of the closure and vacuum producing means communicatingwith the upper end of said freezing chamber and with said vacuumchamber. y

2. An ice machine, comprising a. plurality of casings spaced from eachother and forming an outer vacuum chamber, a chamber inwardly of thevacuum chamber containing insulating material, a freezing chamberinwardly of the insulating chamber, a tank withinthe freezing chamber toreceive the materialto be frozen, a closure having a plurality ,ofsuperimposed chambers, the lower wall of which is apertured to permitcommunication between the freezing chamber and the lower chamber of theclosure, and means to produce a vacuum in said tank and in said vacuumchamber.

l3.4m ice machine, comprising a body portion formed by a. plurality ofcasings which in turn form an outer vacuum chamber, an insulatingchamber inwardly of the vacuum chamber, vand a freezing chamber inwardlyof the insulating chamber, a tank chamber, a closure forsaid bodyportion orming a chamber above'said tank and in free communication withit, said closure having a chamber containing hygroscopic material incommunication with said chamber containing insulating material and afreezing chamber inwardly ofthe insulating chamber, a tank in saidfreezing chamber adapted to be surrounded by a cool-v ing medium, aclosure detachably connected -with said casings inclosing the upper. end

of said tank and said freezing chamber and provided with a chamberhaving its inner wall apertured, and vacuum producing meanscommunicating with said vacuum chamber, said freezing chamber, thechamber of said closure and the upper en d of said tank. Y y

5. An ice machine, comprising a body portion, consisting of a pluralityof casings spaced from each other and formin `an outer vacuum chamber,an insulating c amber inwardly of the vacuum chamber and a' 'freezingchamber inwardly of the-insulting chamber, a tank in said freezingchamber open at its upper end, said freezing cham-V chamber, a chamberinwardly of said vacuum berbeing open at its upper end, a', closure 130for said body. portion, a pluralityof incommunica/ting With said Vacuumchamber sulating' members between said closure and and freezing chamber.

said body portion said' closure having a chamber containilig hygrosoopioAmaterial g JAMES B" 'JOHNSTON' and being provided with apertures com-Witnesses: p municating With said tank andl said freezing E. HAYWARDFAInBANKs,

chamber, and vacuum producing means l. v C. D. MGVAY.

